@graphite I never saw that remake. The novel was very intellectual, and it got into discussions about the nature of intelligence and the behavior of a species, that probably would be too wordy to put into a movie.
@DrWatson In the 2001 remake, the astronaut goes back to find that the Tim Roth ape character, Thade, a villain in the movie, is now revered as a leader of their civilization; there are statues of him.